my experience is once an "A" always an "A" and recovery only comes through help and counseling.
I havent posted here for a long time because I am dealing right now with my own issues, but I am lurking almost every day. I couldnt help respond to this.
It is just a matter of time and my AH was back to drinking again. Slowly like yours BF and then since things seemed ok around him.... the addiction increased as time went on.
Now I am physically and emotionally distant from him, even though he is still in the house.
Good luck and remember to take care of yourself. Sometimes just taking care of yourself and doing the "next right thing" is all you need. Only our Higher Power can see the whole picture.
Get your but to a-alanon and hear all the great experience of others help you.
Missy xo